/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 87111
 * Date: 2025-09-09
 * Time: 20:33
 */
public class Test {
    //孩子表示法
    static class Node {
        public int val;
        public Node left;
        public Node right;
    }
    //孩子双亲表示法
    static class Node1 {
        public int val;
        public Node left;
        public Node right;
        public Node parent;
    }


}
